Implementation of a Quantum Addressable Router Using Superconducting Qubits
Year: 2025
Type: article
Abstract: The implementation of a quantum router capable of performing both quantum signal routing and quantum addressing (a Q 2 -router) represents a key step toward building quantum networks and quantum random access memories. We realize a Q 2 -router that uses fixed-frequency transmon qubits to implement a routing protocol based on two native controlled- i gates. These gates leverage a large Z Z interaction to selectively route information according to a quantum address. We find an estimated average routing fidelity of 95.3 % , with errors arising primarily from decoherence or state preparation and measurement. We present a comprehensive calibration and characterization of both the c- i gates and the overall routing protocol through randomized benchmarking techniques and state tomography.
Source: PRX Quantum
DOI: 10.1103/pq3x-cmw9
Institutions: Stanford University, University of Chicago
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,450
Awards: G1404049065, G1432373144, QuSeC-TAQS: Nanoscale Covariance Magnetometry with Diamond Quantum Sensors, G1523888516, G1932254719, G2145085266, Graduate Research Fellowship Program (GRFP), G2515541506, G2882288540, G3162985271, G3722242190, G431725244, G4516736450, G4546152601, QuIC - TaQS: Interconnects for a Superconducting-Atomic Hybrid Quantum Network, G4848018484, G4876042962, G5659690140, G6167497367, G6478756169, G6518383159, G6526646931, G6547089213, G7420521838, G7452299184, G7572609595, NSF Engineering Research Center for Quantum Networks (CQN), G7796153478, Collaborative Research: FET: Medium: Design and Implementation of Quantum Databases, QII-TAQS: Quantum Metrological Platform for Single-Molecule Bio-Sensing
OpenAlex ID: W4416237378